Roller skate



FIG. 1 is a front elevational view of the roller skate showing my new design;

FIG. 2 is a rear view of the roller skate;

FIG. 3 is a right side view of the roller skate;

FIG. 4 is a left side view of the roller skate;

FIG. 5 is a top view of the roller skate;

FIG. 6 is a bottom view of the roller skate; and,

FIG. 7 is a bottom perspective view of the rocker skate. 

CLAIM The ornamental design for a roller skate, as shown and described. 